Blade-lashing means.



G. E. SWEET. BLADE LASHING MEANS. APPLICATION IILBD AUG. 26, 1909.

Patented Apr, 23, 1912.

J2 2 INVENTOR. B y Y 44. f

H/ T ORNEY IN FACT.

COLUMBIA PLANO GRAI- 'l l fJm- WASHINGTON. D, c.

UNITED STATES PA CHARLES E. SWEET, OF WILKINSBURG, PENNSYLVANIA, ASSIG-NOR, BY MESNE ASSIGNMENTS, TO THE COLONIAL TRUST COMPANY, TRUSTEE, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

BLADE-LASHING MEANS.

Application filed August 26, 1909.

Specification of Letters Patent.

To all whom it may concern Be it known that I, CHARLES E. SWEET, a citizen of the United States, and a resident of ilkinsburg, in the county of Allegheny and State of Pennsylvania, have made a new and useful Invention in Blade-Lashing Means, of which the following is a specification.

This invention relates to blades and more particularly to means for securing together the outer ends of the blades.

In machines employing rotating and stationary blades, it is necessary to employ means for binding together and for spacing the outer or free ends of the blades.

An object of this invention is to produce a simple efficient binding means for both the rotating and stationary blades, which spaces the blade and positively secures them in the correct relative position and which offers a minimum amount of resistance to the flow of fluid traversing the blades.

In the drawings accompanying this application and forming a part thereof, I have illustrated my invention in connection with what may be termed tu bine blades. Such blades difier somewhat in contour from blower blades but it will be understood that my invention is equally well applicable to blades of any form or contour, and that it may be employed in connection with the stationary directing blades as well as the rotating blades.

In the drawings: Figure 1 is a fra-gmental side elevation of a rotating blade carrying element shown in connection with blades and a binding member embodying my invention; Fig. 2 is a side elevation of a blade adapted to cooperate with a binding member embodying my invention; Fig. 3 is a developed plan view of Fig. 1; and Fig. 4c is a developed plan view of the binding members shown in Figs. 1 and 3.

In carrying out my invention, I provide a binding strip which is adapted to be riveted to the blades and which is so formed that the blades are spaced apart and positively locked in the determined relative positions.

Blades 5 are assembled in annular rows and are secured in any suitable manner to blade carrying element 6. Each blade is provided, near one end, with a notch 7 and a hole 8 which are adapted to cooperate in securing a binding member or strip 9 to the blade. The strip 9 is preferably, but not necessarily, of the same metal as the blades and is notched in any suitable manner, as for example, by being punched, or to form recesses 10, into which the blades extend, and spacing or intermediate portions 11, which are adapted to be located between the blades when the strip is in place.

The notches 7 in the blades receive the notched edge of the strip 9 and the strip is positively locked to the blades by riveting over or upsetting tips or tenons 12 formed on the strip and which extend into the holes or perforations 8 provided in the blades. The edges of each slot or recess 10 are of substantially the same contour as the adjacent faces of the blade located in the slot and the slots are of such width that the blades fit snugly so that there is no opportunity for lateral vibration at the slotted edge of the blade. The other edge of the blade is held firmly in place by the riveting over of the tenon 12.

The notches 7 of the blades hold one edge of the strip 9 in place on the blades and the other edge, as has been said, is positively locked to the blades by the tip 12, consequently the strip is prevented from being displaced or distorted by centrifugal force.

The strip is so constructed that it projects beyond the line of the blades on the slotted side of the blades and consequently presents an unbroken edge 13 which will prevent the blades from contacting with the next adjacent row of blades and will therefore prevent blading troubles, due to accidents afiecting the axial adjustment of the rotor element, or to poor alinement of the blades of any of the rows.

The strips 9 may be of any desired length so as to include any number of blades and the holes 8 may be countersunk so that the tenons 12 will be flush with the faces of the blades after being riveted over or upset.

WVhile I have shown no particular method of mounting the blades on the blade carrying element 6, it will be apparent that my invention is applicable to the mounting or base strip of the blades.

What I claim is:

1. In combination with a plurality of blades, a notched strip adapted to receive the blades and provided with tenons which project through openings provided in the blades and are riveted over or upset to posi tively lock the strip in place.

2. In combination with a plurality of blades notched at one edge, a strip projecting into the notches of the blades and provided with recesses in which the blades are located, and tenons formed on the strip extending through openings in the blades and riveted over to positively lock the strip to the blades.

3. In combination with a plurality of blades, a binding member provided with a plurality of recesses the edges of which correspond in curvature to the curvature of the working faces of the blades and in which the blades are located, and tenons formed on the strip extending through holes in the blades and riveted over to positively lock the strip to the blades.

4i. In combination with a plurality of blades notched along one edge to receive a binding member, a binding member projecting into the notches in said blades and provided with recesses in which the blades are located, and tenons provided on the strip and extending through holes formed in the blades and riveted over to secure the blades in place.

5. In combination with a plurality of blades notched along one edge to receive a binding member, a binding member projecting into the notches of the blades and provided with spacing pieces located between the blades and provided with edges which correspond in curvature to the curvature of the working faces of the blades, and means for inter-engaging the blades to positively lock said strip to said blades.

In testimony whereof, I have hereunto subscribed my name this 24th day of August,

CHARLES E. SWEET. Witnesses C. W. MOGHEE, Geo. O. WALKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. 

